Electric lamp



(N6 Model.)

0. J. VAN DEPOELB.

ELECTRIC LAMP.

Patented Oef. 2, 1883.

v UNITED STATES PATENT OFFICE.

CHARLES J. VAN DEPOELE, OF CHICAGO, ILLINOIS.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 286,093, dated October 2, 1883, Application filed May 2li, 1883. (No model.)

To all whom it 111,167/ concern/.-

Beit known that I, CHiiRLEs J. VAN DE- DOBLE, of Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electric Lamps, and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to certain new and useful improvements in electric-arc lamps, by means ol' which a derived circuit is employed to produce a regular feed of the electrodes.

The invention consists in the peculiar construction of the diiercnt parts and their various combinations and mode of distributing the current through the same, as more fully hereinafter described.

In the accompanying drawings, Figure I is a vertical section through the center ofthe lamp. Fi 2 is a plan of the armature and magnets. Fig. 3 is a horizontal section 'through the line x Fig. et is a detail of the brushes and eonnnutator, and Fig. 5 lis a top view of a spider to receive the tripod connected to the louf'ercarbon holder.

Fig. I is a vertical section through the center ol" the lamp. A is an annular electro-magnet, set stationary in the supports F F. a a are contactpoints bringing the terminal ends of' the armature-coils outward. B B are coils of line wire in derivation between the carbons oi' the lamp. C Cis an iron core centrally pivoted around a suitable tube, o', and provided with recesses to receive the line wire of the coils I3 B. D is a post in metallic contact with all positive parts oi" the lamp, and carries a contact-brush, D. E is a post insulated from the positive parts of the lamp, and in contact, by a suitable conductor, e, with an insulated ring, I, capable of revolving with the armature C C. The post E carries also a contactbrush, E. I is a contact-brush bearing upon the ring P. G is a support to the brush I, and in contact with the positive pole of the lamp. K is an adjustable resistance, intended to regulate the amount of current which is to pass into the electro-magnet A. One end is attached to the positive post ol." the'lamp at l, and the other end to the top part or positive part ofthe lamp at post Z. H is a support to the brush J, and is in connection with the negative pole of the lamp. J is a brush bearing upon an insulated ring, u, in electrical contact with the coils B B by a suitable conductor, 'z'. The other end of the coils B B is soldered to the 'core C C at S, and thus is in contact with the positive part of lamp. L is a rod, with a running screw cut the whole length, into which the jaws O O engage. O O are two jaws, forming a divided nut, mounted on suitable springs, revolving with armature C C, and fitted to the screw in the rod L. As seen, the screw-thread is cut at an angle which will allow the rod to be raised without running the armature C C. Q Q. are the positive and negative carbons. S is a carbon-clamp having three jaws, be tween which the carbon is held by the spring in the jaws. XV is a plate, forming, with the rods R, an inverted tripod, holding the lower carbon, and forms the negative part of the lamp, being suitably insulated from the spider IV. T is a tube suitably iixed to the bottoni part of the lamp. V is atlange, provided with a screw engaging in the bottom of the tripod R, thus holding up the glass globe. XV is a spider fastened to the tube T, and holds up the tripod It It It. X is a reflector. Y Y is the bottom plateof the top part of the lamp. t is a tube lined to the top part of the lamp, and protecting the rod L, and from which the lamp can be hung. Z is a socket-bearing, in which the tube ois fastened. I and N are the poles ofthe lamp, and g is the negative conductor to the bottom part of the lamp.

In Fig. 2, A is the annular electro-magnet, lixed stationary to the plate Y. a aare the terminals to the coils in the annular electro-inagnet A. I3 B are the coils in derivation between the poles of the lamp. D is an adjustable contact-spring conveying the current from the coils of A. D is in contact electrically with the whole top part of the lamp, and thus positive. E is the contact-spring communicating current to the electromagnet A. E is insulated electrically from the top part ol" the lamp, and in communication with the positive pole of the lamp by means of c, 1?', I, and G. Z Z 'Il Z are four posts holding up the top part ot' the lamp. L is tbe rod.

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In Fig. 3, A is'the annular electro-magnet. C C is the iron core pivoted centrally around the tube 1'. Y is the bottom plate.

Fig. 4 shows the two circular insulated rings. N3 is in electrical contact by .I with the ring n, which gives passage to the current from B'B by means of the conductor z'. P3 is in contact with the ring P by means of I, and the current is thence led to E by the conduct- Fig. 5 shows the spider WV provided with holes, through which the rods B pass, to support thelower carbon and glass globe. rIhe open` space-between the arms of the spider allows the heat from the lamp to readily pass away, and the iron forms a bearing for the globe and reflector.

Having described the different parts of .my invention, I will now proceed to explain the operation of the lamp.

The current, on being established between the positive and negative terminals of the lamp, divides itself as follows: The current, entering at P, divides itself in two. One part is sent through the annular electro-magnet coils in the same way as in the Pacinotti armature, and comes out on the opposite side at a c to D, which is in contact with all the metallic parts of the top of the lamp, and thus with L, which carries the. positive carbon Q. Thence the current passes to the lower carbon, Q, to R2, and completes the circuit with the negative Ipole N by means of the conductor g, as shown in Fig. 1. The second circuit from P is through the resistance K to the post Z, which is in metallic contact with the positive carbon through the top frame. By giving' K more or less resistance, the amount of current passing through A can be regulated, as desired. The derived circuit around the core C C is as fol. lows: rIhe current from the positive part of the lamp enters B B at S, where the terminal wire is soldered to C C. The current passes` through both coils, comes out at i, and passes over to a n, to J, to I-I, and completes circuit at N. rIhe wire around C C is so coiled as to magnetize its poles with the same polarity as that part of the annular electro-magnet A, under the influence of which it is in order to produce repulsion between the poles of A and C C. The circuit being understood, now let us connect the lamp properly with some source of electricity. The current, on passing through A, will produce a north pole at P anda south pole at N, Fig 2, as the current enters and leaves these opposite points by E and DC .Now, on considering C C, no current is yet` passing through its coils B B, and consequently it is as yet neutral, and will be inueneed by the poles in A and attracted in the direction shown by the -arrows in FiO. 2, and C C will keep on rotating the same way as long as thecarbons are too close together, on account of the current entering on points ahead of the center of attraction in C C; but soon the carbons are separated and aproportionate amount of current is now passing through B B, thus magnetizing the core C C in such a way that its polarity will be of the same name as 1n` A, thus producing repulsion between P and S and between N and N, in Fig. 3, when C C will revolve in the direction indicated by the arrows in this figure. Thus -the nut O O will revolve around L, which is kept from turning, and thus cause L to lower the carbon until the momentrwhen the carbonsare at their normal distance, when a balance will exist between C C and A.

It will be readilyunderstood that whenever the carbons are too close together the polarity in A will tend to attract the revolving armature C C toward the place where the contacts D and E are standing; but since these revolve with the armature C C the polarity in A is al ways ahead ofthe longitudinal center of C C, causing the latter to revolve in the direction indicated by' the arrows in Fig. 2 until B B,

' being in derivation between the two poles of the lamp, will allow more or less current to pass, according to the distance between the two carbons in the lamp, so that as soon as a certain distance between said carbons exists current enough will pass through B B and magnetize C C with the same polarity as in A, so A will repel C C in the direction shown by the arrows in Fio. 3. The action between A and C C will entirely depend upon the distance between the carbons in the lamp, so that it is impossible to hold any larger or smaller arc than what the lamp has been adjusted to, and this adjustment is determined once for all by giving the proper proportions between A and B B; so, practically, this lamp has no springs or anything else to adjust, thus requiring rno trained hands to run or attend to it, and is not liable to be put out of order, all parts being simple and solid.

Instead of using a screw arrangement for raising and lowering the carbons, as here illustrated, any other device may be resorted to which, being actuated bythe electro-magnetic device, will 'produce the feed of the carbons, without departing from the spirit of my invention.

I do not claim in the present application any of the snbject-1nattercovered by the claims in Case B, filed June 18, 1883, Serial No. 98,525, or in Case C, iilcd July 23, 1888, Serial No. 101,614.

Having described the different parts and functions of my invention, I claim as new and desire to secure by Letters Patent- 1. In an electric-arc lamp, a stationary circular electro-magnet constructed to have its polarity shifted step by step by contactbrushes carried by a revolving armature, in combination with a centrally-pivoted armature operated bymain and shunt currents, to produce the feed of the carbons in an electricarc lamp, as described and set forth.

2. In an electric-arc lamp, a stationary circular electro-magnet, the terminals of its coils IOO IIO

provided with proper contact-points arranged around said electro-magnet, in combina-tion with a centrally-pivoted armature carrying brushes or contactsprings so arranged as to allow the current to enter and leave the electro-magnet coils at points diamctrieally opposite each other, the eontact-s] n.ings so placed upon the pivoted armature as to produce the highest point ot' attraction in the circular electroanagnet ahead ol' the center' ot' :fittraction in the pivoted armature, so as to cause, upon the passage oi' the current, the pivoted armature to revolve in the direction above indicated, and so to raise the carbons in the lamp and produce the light, as above described and set i'orth. y

J5. In an electric ai-clamp, a stationary circular electro-inagnct provided with proper means to allow the current to enter and leave the coils oi' the same at points diametrically opposite each other, as above described, in combinatitni with a soltiron centrallyepivoted armature which will be revolved in one direction by the attraction in 'the circular electromagnet upon the passage ofthe current throughA the same, the soft-iron pivotcd armature to be provided with coilsin a derivation between the two terminals ol' the lamp, which coils will produce a polarity in the said armature similar to'that inthe circular electro-magnet with regard to the position in which the armature stands to the electro-magnet whenever the arc in said lamp becomes too long, and so to cause the pivoted armature to revolve in the opposite direction, and thus :feed down the carbons in said lamp as iast as these are consumed, substantially as described.

et. Inan electric-arc lamp, a feeding device operated by an annul ar stationary electro-mag net constructed to have its polarity shifted step by step by contact-brushes carried by a revolving armature operated by said magnet by means ol' main and shunt currents circulating therethrough, as specified, the said revolving armature constructed to react upon suitable mechanism which will separate the carbons when needed and i'eed the saine down as fast as consumed, all as described and set iorth.

5. In an electric-arc lamp, an annular stati onary eleetro-1nagnet, A, and the circuit-connections, as described, in combination with a fixed resistance, K, through which the current .is passing parallel to the current in A,

I the two being in derivation from one another,

said resistance detern'iining the proportion ot current to be diverted through A to operate the feed mechanism of the lamp, substantially as set forth.

6. In an electric-arc lamp, a centrally-piv-f 6o oted armature, in combination with an annu lar electro-magnet, inside of which the pivoted armature is intended to oscillate or revolve, the pivoted armature provided with brushes or contact-springs bearing upon the terminals ol' the coils in the annular electromagnet, and. thus allowing the current to pass through the coils ol'said electroanagnet, which, reacting upon the pivotcd armature, will cause the latter to revolve either to the right or to the left, and so to produce and regulate the l'ced ol' the carbons in said. electric lamp.

T. ln an electric-aic lamp, and in combination with theI circular electro-magnet A and armature (.1 (l, the insulated rings n and j; and their connections, provided with contactbrushes I and J', which, being properly connected with the iositive and negative )olesoi' the lamp, will give passage to the current to the different parts ol' the lamp, substantially as described, and l'or the purpose set lorth.

8. In an electric-arc lamp, the annular electro-magnet A and the pivoted armature C i), in combination with a two-part nut, O C), carried by said pivoted armature and actuating the rod L, substantially as described, the twopart nut to be held in place by suitable springs which will allow the rod to be slipped upward without revolving U (l, all as shown and speciiied.

E). In an electric-arc lamp, the annular electro-magnet A, provided on its periphery with contacts c ny a to its coils, in combination with the pivoted armature C (i, wound with coils B B, suitably connected with ring n and negative pole N, and provided with the contactsprin gs l) and E, adapted to communicate the proper current to A by means ot' contact-points a a c, &c., the contact E being suitably connected through a ring` with the positive pole of lamp and suitable intervening mechanism actuated by said armature to feed the carbon, substantially as described.

CHARLES J'. TAN DEPOELE.

Witnesses:

H. S. SPRAG'UE, E. W. ANDREws.

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